Dumping-platform.



F. W. COOLEY.

DUMPING PLATFORM.

APPLICATION man MAR'. 12. 19.17.

1,250,974. Patented Dec. 191?.

2 SHEETSHSHEET l.

2' SHEETS-SHEET 2-.

Patented Decn 25,1917.

F. W. COOLEY.

DUMPING PLATFORM.

APPLICATION FILED IIIAII. I2. 19.11.

/Cfea/ 14./ COO/ef BY H/ A Trae/V576 STATES FEED W. CooLEY, 0F'MINNEAPoL1sMI-1\I"NE^SOTA.

DIMIINGLPIZTEORM'.

speeicationvof Letteren-tem;

racenteunec. 25,1917.

Application filed-Marchi@ 191-7. :Serialfli'o 1545149.

To all lwhom t may concern: Y

Be it known that I, FRED W. COOLER-.fa

citizen of the United States, residing -at Minneapolis, in the county ofHennepinrand State of Minnesota, have invented certain new and usefulImprovements in Dumping- Platforms; andlk do hereby declare the fol-Vlowing to be a full, clear, and exact` descrip- Ation of the invention,such aswill enable others skilled in the art to which ltvapper tains tomake and use the same.-

My invention relates to dumping platforms intended for rgeneral use,but-more es-- peciallyy intended for use 'zas Awagon(l dumps for use inconnection with country elevators, and whereinrsuch ywagon. dumps areusually incorporated within the platforms of weighing scales located indriveways, so

-that wagons yloaded with grain may-,be

fragmentary longitudinal vertical section,y

withsome partsshown in different-positions by means of broken lines;

Fig. 2 is atransverse section takenpon the line 2-2 ofl Figl;

Fig. 3is a view of certain parts, ast-shownv in-Fig.-2, but onanenlargedscale; Fig. 4e is a longitudinal vertical section. taken onthe line 4 4 ofFig.` 3, with-'some parts shown in different positions bymeans of broken lines;

Fig. 5' is a detail view in section'taken'on the line 5 5 of Fig. .4;

Fig. 6 isa detail view insection takenon the line 6-6 ,ofl Fig. 4; and'Fig. 7 is al detail view in sectiontakenon the line 7 7 of Fig;4. I

The numeral 9y indicatesY a; driveway. hav,-

ing located fi there-in. a7 weighing. scale lplatformi-mountedooncarrying timbers l1'. 'Locatedl-under'the Scalea-platform .710, is `apitV l2 in-which-fA is mounted ianfvrelevator fboot and leg, f not-:shown. Y Formed within *ther scale Iplatforrn 10,':siswa1 rectangular-1openingE 131 in which xis imo'unted-adumpingv platform-14, commonlycalled a; wagon dump.

'This dumping p latformi 14 is= intermediately mountedffortiltinghmovement on a hori-v zontaltransversshafti15; thefen'ds` ofwhich are securedl -toA ther-'scale platformlO. SuspendedA fromthei-front-i endvof the dumping platform; 14,- 'hinges 16,1-is' the?customary guardi?, whicli,wlien saijdxplatform isa tilt;- edyo'losesithe opening.l into` the"V pit.

Formed in the: :scale yplatform 10, `at the rear of Lthe'i dumping'.platform :14, is @an opening lfinto vthe ',pit'f12 :which isnormallyclosed by. a.; trap .door 19 connected: yby

hinges 20 to the scale platform l0 'forz open-ingi movementaawayafromlvthe,` dumping platforms-14'. lengtY nod'zAQL-:connected tothetrap'ldoors-19` byranrreyefbolt 22, yis Aprovided foruopeninfgandzolosinglsaidsdoor and fon: supportingI thelfsamei in an: .openypositionyasf shown: iniFig'.1=. Extending transversely under itheopening v18', :is a timber 23 covered -aLnV apron124,2 which' extendstoy the ffront oftthefopening: 1:8 and.; directs f Extending ftransversely iunder the'` scale platform 1.0,;:is aahorizontal.. mairr`shaftiz25 journaledinibearings:26 secureditotheztimber 123,fwhichf. .isoarrie'dfby.ther scaleplat'- cured' tofV one of. the:imainllongitudinaltimbersf'off-said platform.- An u-prightpost128issupportedzfromand at onefside'bf the scale iplatfomnalO angle` irons29-1and ris suitably bracedftherefrom .by'braces 80. yThe lowe'rendv .of.the''postr 282 is a extended` below the-'surface of"l the driveway f '9i and is 1 supported, in .part',=.;by .the adjacent end' ofthe .Thefmain1 shaft :25 is. ro-

main shaft '25.

tated in :either fdirecti-on-y byl a* crank lwheel 3l on a short shaft32journaledl in bearings rsecured toithetuppenend of the.i post 28. Al`sprocket A'chain:34krims over a small fspr'ocke't'wheell-:Slon'the=shaft '32 and *a large 1 sprocket' wheel 361 oni the!lmain 'shaftl 25. .fTh-erspeedizat"whichithe shaft 32120- v.

tates-may ".be i: governed by fa' 'hand 'piece equipped .brakeL abalid'.537 coperating Y A Wheel 3S on said shaft. The shaft 32 may be locked,at Will, againstrotation in one direction, as will presently appear, bya c0- operating ratchet Wheel and dog 39.

A pair of sprockety wheels 40 are secured for rotation with the mainshaft 25 and are alined with sprocket Wheels 41 loosely journaled on arod 42, which extends parallel to the shaft 25 and forms the transversemember of a U-shaped frame, the arms 43 of which are pivoted at theirupper ends to said shaft. Heavy sprocket chains 44 are arranged to runover the alined pairs of sprocket Wheels l40 and 41. Each sprocket chain44 is connectedto the adjacent end of the tilting platform- 14 by a`combined lifting and supporting bar 45. These bars 45 are mounted inU-shaped guide brackets 46 for horizontal endivise sliding movementlongitudinally of the tilting or dumping platform 14. Journaled in theguide brackets 46, are anti-frictionrollers 47 on and under which theintermediate portions of.`

thebars 45 travel. The outer ends of the bars 45 are bifurcated and theprongs thereof embrace .the respective sprocket chain 44 and arepivotally connected thereto by pivot bolts .48. `Pairs 'of vdepending,llinksv49 support the inner ends of the bars 45 from the timbers of thetilting platformk 14 with freedom to partake of their endwise movements.

When thetilting platform 14 isin normaliv position, the prongs ofthebifurcated ends of the bars 45 rest directly upon the hubs of thesprocket Wheels 40 as supports and vthereby afford positive means forholding the platform 14 against tilting movement and support theadjacent end thereof. yThe initial movement, imparted to the sprocketchains 44 by operating the crank Wheel 31,

to tilt the platform 14, Will move the bars 45endwise out of engagementwith their fixed supports, to Wit: the hubs of the sprocket Wheels 40.In placerof using the hubs of the sprocket Wheels 40 as supports for thebars 45, the shaft 25, or any other suitable support, may be used.v Afurther movement of the sprocket chain 44 in the same direction Willimpart the necessary movement to carry the platform 14 into aA cposition, as shown in Figs. 1 and 4. Are-` oted in aV bearing 51securedto one of theV transverse-timbers of `thevscale platform 10. Thelower or short ends of the latch levers ,50, when in operativepositions, ex` tend between pairs of longitudinally spaced cam lugs 52and 53 formed on certain of the prongs of the bifurcated ends of thebars 45.

of the trap door 19 lock lugs 5G, which ex` tend in the paths ofmovement of said levers from operative to inoperative positions.Obviously, While the trap door 19 is closed, the latch levers 50 arepositively held in operative positions, and hence, the bars 45, Whichhold the platform 14 against tilting movement.

release the latch levers 50 and permit the same to be moved intoinoperative positions by their Weights 55, during the retractingmovement of the bars-45.Y lIn case the latch levers 50 should stick,during their movement into inoperative positions, the cam lugs 53, underthe retracting movement of theibars 45, Will positively operate thesame.

:When the latch levers 50 are in inoperative position, it is impossibleto completely close thextrap door 19, for the reason that the lock lug56 thereon `will engage the kupper ends of said latch levers as stops.It Will thus be seen that if the trap door 19V is only partly closed,the operator Will know that the tilting platform is not locked againsttilting movement. VTo limit the tilting movement'of the platform 14,positive stops are provided therefor. As shown, these stops are formedby attaching one of the ends of a pair of chains 57 to the timber 23 bya common eye-bolt 5S, and attaching the other ends of said chains byeye-bolts 59, one to each of the adjacent ends of the centrallongitudinal timbers of the plat- 4form 14. Obviously, these stop chains57 will relieve all of the strain on the tilting mechanism oftheplatform, at the time the same reaches and is held in its loWermostposition. f

From the above description, it is evident that the tilting platform 14,when in normal position, is supported at its front endby the carryingfinger 11, at its intermediate portion, by the shaft 15 and, attits rearend, by the bars 45. Itwill thus be seen that the tilting platform 14 issecurely held in normal position. In case the tiltingV platform 14should bend under a load thereon,

Vthe bars 45, when moved into Contact with On the upper or long end ofeachW To tilt theplatform 14, it is` first necessary to open the trapdoor 19 to the hubs of theavheels 40, Will-,positively bring saidplatform back into itsforiginal position.

What I claim is ,K

1.The combination with a tiltingy platform and a trapdoor, "of operatingconnec,

2. The combination With a tiltingplat-V form and a trap door, ofoperating connections for tilting said platform, a latch for securingsaid connections in a position lto hold said platform against tiltingmovement, and a. lock lug on the trapydoor arranged, when said door isclosed, to hold the latch in an operative position. y

3. The combination with a tilting platform and a trap door, of operatingconnections for tilting said platform, a latch for securing saidconnections in a position to hold said platform against tiltingmovement, and a lock lug on the trap door arranged, When said door isclosed, to hold the latch in an operative position, said latch arrangedto prevent the closing movement of the trap door, except when said latchis in an operative position.

rIhe combination with a tilting platform and a trap door, of operatingconnections for tilting said platform including a movable bar adapted,when in one of its positions, to hold said platform against tiltingmovement, a latch for holding said bar in l the position in which itsecures said platform against tilting movement, and a lock lug on thetrap door arranged, When said door is closed, to hold the latch in anoperative position.

5. The combination With a tilting platform and a trap door, of operatingconnections for tilting said platform including a movable bar adapted,when in one of its positions, to hold said platform against tiltingmovement, a latch for holding said bar in the position in Which itsecures said platform against tilting movement, and a lock lug on thetrap door arranged, when said door is closed, to hold the latch in anoperative position, said latch arranged to prevent the closing movementof the trap door, except when said latch is in an operative position.

rIhe combination with a tilting platform and a trap door, of operatingconnections for tilting said platform including a movable bar adapted,when in one of its positions, to hold said platform against tiltingmovement, a latch for holding said bar in the position in which itsecures said platform against tilting movement, said latch being underyielding strain tending to move the same into an inoperative position,acfnn lug on said bar arranged to engage the latch, during the movementof said barv in one direction, and carry the same into an/operativeposition, anda lock lugon theftrap,

door arranged, when said door is closed, to hold the latch in anoperative position.

7. The combination With a tilting platform, of operating connections,for tilting said platform including a barv mounted for endivise`movement on said; platform, and. a`

relatively fixed support With which said bar engages, inone position Vofthe operating.

connections, to hold said platform against tilting movement. A

8. The combination With a tilting. platform, of a main shaft andVoperating connections therefor, a depending Vand horizontally swingingframe carried by said shaft, a pair of alined chain Wheels,the onesecured for rotation With the main shaft and the other journaled on saidframe, a chain arranged to run over said Wheels, a lifting bar securedto said chain and mounted on the tilting platform for endivise movement,and a support onto which the lifting bar is moved by said chain in oneof its positions to hold said platform against tilting movement.

t). The combination with a tilting platform, of a main shaft andoperating connections therefor, a depending and horizontally swingingframe carried by said shaft, a pair of alined chain Wheels, the onesecured for rotation with the main shaft and the other journaled on saidframe, a chain arranged to run over said Wheels, a lifting bar securedto said chain and mounted on the tilting platform for endwise movement,a support onto Which the lifting bar is moved by said chain in one ofits positions to hold said platform against tilting movement, and alatch for holding said lifting bar on said support therefor.

10. The combination with a tilting platform, of a main shaft andoperating connections therefor, a depending horizontally swinging framecarried by said shaft, a pair of alined chain wheels, the one securedfor rotation with the main shaft and the other journaled on said frame,a chain arranged to run over said Wheels, a lifting bar, a guide bracket'on the tilting platform in which said bar is mounted for endWisesliding movement, a link connecting one end of said bar to the tiltingplatform, the other end of said bar being secured to said chain, and asupport onto which the tilting bar is moved by said chain in one of itspositions to hold said platform against tilting movement.

l1. The combination With a tilting platform, of a main shaft andoperating connections therefor, a depending and horizontally swingingframe carried by said shaft,

a pair of alined chain wheels, the one secured for rotation with themain shaft and the other journaled on said frame, a Chain arranged torun over said Wheels, a lifting bar secured to said chain and mounted onthe tilting platform for endivise movement, a support onto which thelifting bar is moved by said chain in one of its positions to hold saidplatform against tilting movement, a pair of cam lugs on said bar, and alatch lever arranged to extend between saidA cam lugs, when said har isresting on the support therefor, and thereby hold the bar againstmovement from said support.

l2. The combination With a tilting platform, of a. main shaft andoperating connections therefor, a depending and horizontally swingingframe carried by said shaft,

a pair ofralined chain Wheels, the one secured for rotation With themain shaftrand the other journaled on said frame, a chainV In testimonwhereof I aiiX my signature in presence o two Witnesses.

FRED YV. COOLEY.

Witnesses:

F. D. MERCHANT, HARRY D. KILGORE.

Copies of this patent may be obtained for Eve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

